American Music Awards 2012: The show

November 18, 2012 |SFGate.com

From Justin Bieber getting smooched to PSY and MC Hammer performing together, here are highlights from the AMAs.

Kevin Winter/Getty Images

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Singer Usher kicked off the the 40th American Music Awards with a lasertastic performance at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

Kevin Winter/Getty Images

2of46

Singer Usher kicked off the the 40th American Music Awards with a lasertastic performance at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)